TY  - RPRT
TI  - Circular of the Bureau of Standards no. 43 2nd edition: jewelers' and silversmiths' weights and measures
PY  - 1921
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CIRC 43e2
DO  - 10.6028/NBS.CIRC.43e2
ER  -